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Development of ion control system of nutrient solutions for preservation of environment and high quality production

开发营养液离子控制系统以保护环境和高质量生产

基本信息

批准号：
13660263
负责人：
INDEN Haruhisa
金额：
$ 2.24万
依托单位：
MIYAZAKI UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2001
资助国家：
日本
起止时间：
2001 至 2002
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-13660263/
关键词：
hydroponics management of nutrient solution ionic balance ion concentration "IonAdjuster"waste nutrient solution 培養液イオン濃度 EC pH

项目摘要

A computer software program for aiding the mixture of macronutrients in nutrient solutions, named "IonAdjuster", has been developed to select the best combination from various nutrient sources to determine required addition rates, according to user-specified demand and current analysis results. "IonAdjuster" determines the quantity of concentrated stock solution to be added from differences in required composition and the present macronutrient concentrations in solution. In practical hydroponic culture of fruit vegetables, fluctuation of ion contents of the solution was decreased and the percentage of top-grade fruit increased by the nutrient stock addition according to "IonAdjuster". On the contrary, in the traditional EC control method, each ion concentration greatly fluctuated, this meant it shifted considerably from the initial value in the later stage of cultivation, and the ionic balance also collapsed. The value of pH decreased gradually as usual in the nutrient solution culture, however, adding the pH stabilization routine to the ion concentration control method could solve it. It was assumed that the combination of "IonAdjuster" and automatic ion sensing, might allow for appropriate and continuous control of solutions in closed hydroponics. This developed system may result in higher crop production, more efficient use of fertilizer and environmental loading reduction by decreasing waster nutrient solution at renewal from open hydroponic systems.

开发了一种用于帮助营养液中常量营养素混合的计算机软件程序，名为“IonAdjuster”，可根据用户指定的需求和当前的分析结果，从各种营养素来源中选择最佳组合，以确定所需的添加率。 “离子调节器”根据所需成分的差异和溶液中现有常量营养素浓度来确定要添加的浓缩储备溶液的量。在果类蔬菜的实际水培中，根据“IonAdjuster”添加营养原液，可以减少溶液中离子含量的波动，提高优质果的比例。相反，在传统的EC控制方法中，各离子浓度波动较大，这意味着在培养后期其与初始值发生了很大的偏离，离子平衡也崩溃了。营养液培养中pH值逐渐下降，但在离子浓度控制方法中添加pH稳定程序可以解决该问题。据认为，“IonAdjuster”和自动离子传感的结合，可能允许对封闭水培中的溶液进行适当和连续的控制。这种开发的系统可以通过减少开放式水培系统更新时的废弃营养液来提高作物产量、更有效地利用肥料并减少环境负荷。